Engine problem - p0300 - Whats the fix?

Baer383 · 02-14-2013, 09:14 PM

I got that code and turned it off with Uprev

370Z JT · 02-15-2013, 02:12 AM

If it comes back on, clean the MAF sensors like stated above. I had the same code twice since owning the Z and cleaning the sensors worked both times.

JDHeart · 02-26-2013, 12:00 AM

Having this issue right now myself with one difference. I am only getting the random misfire detected and no indication of a specific cylinder. While I am driving I also get my "Service Engine Soon" light flashing at me, then off for a half mile then flashing again. Got home and ran the code and it doesn't specify a cylinder. And advice would be great. Thanks

And have I lost my way, or is one coil pack really $125?

ajc1884 · 02-26-2013, 08:27 AM

JDHeart.....when this happened to me the light was steady (not blinking). Im not sure but i think a blinking SES light is worse than a steady one.
Someone else that has had their Z longer or knows more about them can probably verify this for us.......

tjlazer · 02-16-2014, 05:06 PM

I keep getting this code, ever since I got my spark plugs replaced and UPREV done on it. Maybe its a bad connection to coil pack?

1slow370 · 02-16-2014, 06:36 PM

it's in the owners manual a blinking ses light means that the car is detecting misfire, and congratulations this is the 5000th thread about p0300! you've won the title of permanewb. p0300 is the ecu's catch all for something isn't right. there are over 5 pages of troubleshooting in the factory service manual on it that basically referance every other chapter in the manual, so good luck fixing it.

Edit: the only real fix is to take it to 3 or 4 dealerships porbably about 10 times until they finally figure out what is wrong.

tjlazer · 02-16-2014, 06:39 PM

What are you talking about? I didn't post a new thread, this is an ongoing thread on the same issue and I posted a reply on it. There is no 5000th thread, yours is the worthless post. If you don't like people replying to a post ignore and move on.

1slow370 · 02-16-2014, 06:45 PM

not you the op do a search 5000 is an exageration but there are tons of threads about p0300, it runs everything in the book from bad tank of gas to plugged cam timing actuators, to a coroded connectors, to a blown engine mount, bad bearings, burned coils, a f'd up ecu, plugged air filters, weak fuel pump, stuck injectors, I personally had a bad thrust bearing and the vibration from the crank was causing it, to bad o2's to dirty mafs to almost anything else on the car, the only way to reliably get it fixed is to keep taking it to the dealership until it is.

tjlazer · 02-16-2014, 06:46 PM

^ oh ok

I think I might try cleaning my MAF sensors since I run K&N Typhoons.

TerribleONE · 02-16-2014, 07:21 PM

Quote:

Originally Posted by 1slow370

it's in the owners manual a blinking ses light means that the car is detecting misfire, and congratulations this is the 5000th thread about p0300! you've won the title of permanewb. p0300 is the ecu's catch all for something isn't right. there are over 5 pages of troubleshooting in the factory service manual on it that basically referance every other chapter in the manual, so good luck fixing it.

Edit: the only real fix is to take it to 3 or 4 dealerships porbably about 10 times until they finally figure out what is wrong.

Seeing as this thread was started over a year ago, I don't think the OP gives a sh1t.

1slow370 · 02-16-2014, 07:34 PM

oh in that case guess it was a zombie thread revival.

7speed · 02-16-2014, 08:47 PM

Quote:

Originally Posted by tjlazer

I keep getting this code, ever since I got my spark plugs replaced and UPREV done on it. Maybe its a bad connection to coil pack?

My car is at dealer as of Saturday for blinking ses and has p300 code. Dealer is going to change plugs and coilpacks since they said the valve cover is leaking. Which I thought they fixed in November but that's another story. If I still have p300 then like people mention could need Maf cleaning or aem cAi messing with signal.

1slow370 · 02-16-2014, 11:36 PM

or it could be one of a thousand random other things

so that you don't have to find my posts in one of the older threads when they did mine it took 7 trips to the dealer and 4 months until I found the problem and pointed it out to them(blown thrust bearing)

02-14-2013, 09:14 PM	#16 (permalink)
Baer383 A True Z Fanatic Join Date: Aug 2010 Location: Lawrenceville,Ga Posts: 4,293 Drives: My foot up your azz Rep Power: 30	I got that code and turned it off with Uprev __________________ 2013 ZL1 754 rwhp 747 rwtq

02-15-2013, 02:12 AM	#17 (permalink)
370Z JT A True Z Fanatic Join Date: Jan 2010 Location: United States Posts: 2,905 Drives: 370Z PW 7AT Rep Power: 378	If it comes back on, clean the MAF sensors like stated above. I had the same code twice since owning the Z and cleaning the sensors worked both times. ajc1884 likes this. __________________ Click for My Journal Top Secret \| EVO-R \| Fujimura Auto \| Shine Auto \| Seibon \| MRWorks \| Swift \| SPC \| SSR \| UpRev \| Project Kics \| NST \| Titek \| Eibach \| Nismo \| Whiteline \| Quaife \| Invidia \| Fly1 \| CF Element \| Carbon Signal

02-26-2013, 12:00 AM	#18 (permalink)
JDHeart Base Member Join Date: Aug 2009 Location: Port Orchard, WA Posts: 135 Drives: 09 370Z Graphite M6 Rep Power: 16	Having this issue right now myself with one difference. I am only getting the random misfire detected and no indication of a specific cylinder. While I am driving I also get my "Service Engine Soon" light flashing at me, then off for a half mile then flashing again. Got home and ran the code and it doesn't specify a cylinder. And advice would be great. Thanks And have I lost my way, or is one coil pack really $125? Faryas likes this. __________________ Those who dance are considered insane by those who cannot hear the music!! ROLL TIDE ROLL!!!!

02-16-2014, 05:06 PM	#20 (permalink)
tjlazer A True Z Fanatic Join Date: Dec 2009 Location: Tacoma Age: 53 Posts: 2,496 Drives: Z34, R35 Rep Power: 20	I keep getting this code, ever since I got my spark plugs replaced and UPREV done on it. Maybe its a bad connection to coil pack? __________________ 2009 370Z Monterey Blue,Nismo Conversion,RE-11's, K&N Typhoon intakes,Blue Kickplates,Homelink,FI 18" CBE,ERZ HFCs,Hotchkis sways, Swift Spec-R, EVO-R Highwing, UPREV

02-16-2014, 06:36 PM	#21 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7251	it's in the owners manual a blinking ses light means that the car is detecting misfire, and congratulations this is the 5000th thread about p0300! you've won the title of permanewb. p0300 is the ecu's catch all for something isn't right. there are over 5 pages of troubleshooting in the factory service manual on it that basically referance every other chapter in the manual, so good luck fixing it. Edit: the only real fix is to take it to 3 or 4 dealerships porbably about 10 times until they finally figure out what is wrong. SPOHN likes this. __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

02-26-2013, 08:27 AM	#19 (permalink)
ajc1884 Base Member Join Date: Jan 2013 Location: central, pennsylvania Posts: 191 Drives: 2012 370z Touring Rep Power: 13	JDHeart.....when this happened to me the light was steady (not blinking). Im not sure but i think a blinking SES light is worse than a steady one. Someone else that has had their Z longer or knows more about them can probably verify this for us.......

02-16-2014, 06:39 PM	#22 (permalink)
tjlazer A True Z Fanatic Join Date: Dec 2009 Location: Tacoma Age: 53 Posts: 2,496 Drives: Z34, R35 Rep Power: 20	What are you talking about? I didn't post a new thread, this is an ongoing thread on the same issue and I posted a reply on it. There is no 5000th thread, yours is the worthless post. If you don't like people replying to a post ignore and move on. 370Z JT, jlo370z, Kmccarthy714 and 2 others like this. __________________ 2009 370Z Monterey Blue,Nismo Conversion,RE-11's, K&N Typhoon intakes,Blue Kickplates,Homelink,FI 18" CBE,ERZ HFCs,Hotchkis sways, Swift Spec-R, EVO-R Highwing, UPREV

02-16-2014, 06:45 PM	#23 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7251	not you the op do a search 5000 is an exageration but there are tons of threads about p0300, it runs everything in the book from bad tank of gas to plugged cam timing actuators, to a coroded connectors, to a blown engine mount, bad bearings, burned coils, a f'd up ecu, plugged air filters, weak fuel pump, stuck injectors, I personally had a bad thrust bearing and the vibration from the crank was causing it, to bad o2's to dirty mafs to almost anything else on the car, the only way to reliably get it fixed is to keep taking it to the dealership until it is. SPOHN likes this. __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

02-16-2014, 06:46 PM	#24 (permalink)
tjlazer A True Z Fanatic Join Date: Dec 2009 Location: Tacoma Age: 53 Posts: 2,496 Drives: Z34, R35 Rep Power: 20	^ oh ok I think I might try cleaning my MAF sensors since I run K&N Typhoons. __________________ 2009 370Z Monterey Blue,Nismo Conversion,RE-11's, K&N Typhoon intakes,Blue Kickplates,Homelink,FI 18" CBE,ERZ HFCs,Hotchkis sways, Swift Spec-R, EVO-R Highwing, UPREV Last edited by tjlazer; 02-16-2014 at 06:52 PM.

02-16-2014, 07:34 PM	#26 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7251	oh in that case guess it was a zombie thread revival. __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

02-16-2014, 11:36 PM	#28 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7251	or it could be one of a thousand random other things so that you don't have to find my posts in one of the older threads when they did mine it took 7 trips to the dealer and 4 months until I found the problem and pointed it out to them(blown thrust bearing) 7speed likes this. __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

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